CARBON DIOXIDE SEQUESTRATION THROUGH FORMATION OF GROUP-2 CARBONATES AND SILICON DIOXIDE
First Claim
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1. A method of sequestering carbon dioxide produced by a source, comprising:
- (a) obtaining a hydroxide salt in an aqueous mixture;
(b) admixing the hydroxide salt with carbon dioxide produced by the source under conditions suitable to form a first carbonate salt in a first admixture;
(c) chlorinating a group-2 silicate mineral with hydrochloric acid under conditions suitable to form a corresponding group-2 chloride salt, water, and silicon dioxide;
(d) admixing the group-2 chloride salt with the first carbonate salt under conditions suitable to form a group-2 carbonate salt in a second admixture; and
(e) separating said group-2 carbonate salt from the admixture,whereby the carbon dioxide is sequestered into a mineral product form.
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Abstract
The present invention relates to carbon dioxide sequestration, including processes in which group-2 silicates are used to remove carbon dioxide from waste streams to form corresponding group-2 carbonates and silica.
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Citations
29 Claims
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1. A method of sequestering carbon dioxide produced by a source, comprising:
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(a) obtaining a hydroxide salt in an aqueous mixture; (b) admixing the hydroxide salt with carbon dioxide produced by the source under conditions suitable to form a first carbonate salt in a first admixture; (c) chlorinating a group-2 silicate mineral with hydrochloric acid under conditions suitable to form a corresponding group-2 chloride salt, water, and silicon dioxide; (d) admixing the group-2 chloride salt with the first carbonate salt under conditions suitable to form a group-2 carbonate salt in a second admixture; and (e) separating said group-2 carbonate salt from the admixture, whereby the carbon dioxide is sequestered into a mineral product form. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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